Independent Truck Suspension ITS 80 F
Comfort, efficiency, reliability - based on these standards, ZF developed its new ITS 80 F independent suspension for heavy trucks.
It weighs 40 kg less compared to the current, air spring rigid axle which is guided by control arms. This is also a weight advantage of more than ten percent compared to the current independent suspension. ZF's engineers achieved this by further developing the steering knuckle support principle. The control arms have been extended towards the steering knuckle pin and have been directly connected to it. The spring forces are now supported by a separate, compact spring carrier. For this reason, the steering knuckle support could be omitted completely. This reduces the unsprung masses, enhances the axle kinematics, and allows for larger suspension travel.
High Comfort as a Central Criterion
Like this, road bumps can be more easily compensated by the chassis, which reduces the stress for vehicle and driver. Especially in long-distance traffic with heavy trucks, high comfort is a central criterion for a workplace that reduces tiring and protects the driver's back. The axle halves of the independent suspension are designed as pre-assembled units. The kinematics and installation space consider the ladder-type chassis typical for trucks as well as the space requirements of the driveline. Furthermore, large steering angles guarantee an ideal turning radius.
The development target, however, was not only to improve the driving comfort, but also the protect the road surface. Apart from the smaller unsprung masses, the Air Spring Damper Module (LDM) by ZF contributes to this target as it enables an ideal damping and chassis suspension with the lowest possible demand for installation space. Like this, transport goods arrive at the end customer's without any damage even in case of poor road conditions.
Thus, the ITS 80 F independent suspension sets new standards for a more economic way of transporting goods. The lower total weight saves fuel and keeps the emission values on a low level. The design considers the truck's available installation space and offers the vehicle manufacturer good conditions for integrating modern chassis technology.